To prove the validity of our approach, we performed experiments on various vehicle counting datasets, offering different domain shift characteristics. Specifically, we exploited two existing datasets for traffic density estimation: WebCamT [1]} and TRANCOS [2]}. Then, we used two additional datasets that we created on purpose and made publicly available: the ndispark dataset and the gta dataset. fig:examplesimagesinstancesdensities shows some images belonging to these datasets, together with the associated labels and the corresponding generated density maps used for the counting task. In the following, we describe more in detail each of them.
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